useExternalPurchaseCustomLinks property
Experimental: This API is experimental and may be changed or removed in a future update.
iOS-only, will be ignored for Android. Whether a web purchase button that opens its link in the external browser goes through Apple's external purchase custom link flow: the customer is shown Apple's disclosure notice, and the purchase is reported to Apple.
Disabled by default. Enabling it requires the app to carry Apple's external purchase link entitlement, otherwise no purchase can be made outside the App Store.
Implementation
bool useExternalPurchaseCustomLinks = false;